أرسل هذا في رسالة قصيرة: Synthesis and diatropicity of trans-2′,5′,10b,10c-tetramethylfurano[3,4-e]-10b,10c-dihydropyrene. A valence isomerization to form a novel isoannulenofuran at the expense of two benzene and one furan rings

  _____     _____     ______     ___      _____   
 / ____||  |  ___||  /_   _//   / _ \\   |__  //  
/ //---`'  | ||__    `-| |,-   | / \ ||    / //   
\ \\___    | ||__      | ||    | \_/ ||   / //__  
 \_____||  |_____||    |_||     \___//   /_____|| 
  `----`   `-----`     `-`'     `---`    `-----`